Getting an intermittant buzzing/high frequency noise from dash on start-up - sometimes it stops but sometimes it just keeps on buzzing.

Anyone had the problem? it is driving me insane

Maybe some bees in there? LOL Just kidding - I could not resist.

Seriously, it sounds like a relay or something sticking. Does it seem to change with the outside temperatures? Does everything on your instrument panel seem to be in proper working order, even with the buzzing?

Sounds more like a bunch of hornets!

The rev-counter is not working but everything else is fine. The sound is the result of something sensitive as it stops if I hit a road bump.

Oh my .... I bet that could get very annoying. Hopefully you have it in proper working order by now?

Good evening.

Should also mention that I think the OVP relay is playing up as I get occassional stall at idle or deacceleration. I'm having that checked - maybe related!

From over near the glovebox??? All the way to the right?
Gilly

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Hi Gilly, Dead right - screams away on most start-up's and sometimes stops, bump etc, but not always. Jim

Over to the right of the glove box (I know not much room inside the dash there) there is a small suction fan which draws air through a tube which runs up the right windshield post, to the dome light, through that small slotted square hole in the dome light, which draws air through the incar temp sensor. Over-engineering at it's best. The fan needs to either be replaced or you can take it out, try to clean and lube it up. I think the noise might go away if you try shutting off the climate control, if you want to see if that affects it.
Gilly

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Check your fuses especially the instrument cluster one, take it out, look at it closely, then put it back, or if burnt, replace. I believe it's a red one.

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Hah, that little oinker is now unplugged. The climate system will be dealt with another time.

Problem solved.

(rubs hands) "What's next?"

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Dan

86 300 SDL
New odometer gears, new rubber fuel lines, removed and plated EGR, redone underhood vacuum system, BoostValve on the turbo, IPod only sound system, changed a couple of window motors, refinished the console wood, changed a couple of switches, removed welded and replaced my oilpan after I cracked it (driving like an idiot), new glowplugs, new/used glowplug relay, sunroof repaired, antique brass boost gauge on the hood.